Table 1. Association of presence or absence of FABP4 haplotypes with various milk production traits (mean ± SE)1,2.
| Trait3 | Haplotype assessed | N | Single-haplotype model | Multi-haplotype model | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Absent | Present | Absent | Present | P | Other haplotypes in model | Absent | Present | P | ||
| MY (kg/d) | A | 208 | 511 | 23.77 ± 0.24 | 23.07 ± 0.17 | 0.005 | B,C | 23.56 ± 0.26 | 23.30 ± 0.19 | 0.390 |
| B | 494 | 225 | 23.07 ± 0.17 | 23.73 ± 0.24 | A,C | 23.06 ± 0.21 | 23.81 ± 0.23 | 0.009 | ||
| C | 298 | 421 | 22.99 ± 0.20 | 23.44 ± 0.18 | 0.063 | A,B | 23.17 ± 0.24 | 23.70 ± 0.20 | 0.058 | |
| FP (%) | A | 208 | 511 | 4.97 ± 0.04 | 5.06 ± 0.03 | 0.032 | B,C | 4.99 ± 0.05 | 5.04 ± 0.03 | 0.397 |
| B | 494 | 225 | 5.06 ± 0.03 | 4.98 ± 0.04 | 0.090 | A,C | 5.05 ± 0.04 | 4.98 ± 0.04 | 0.115 | |
| C | 298 | 421 | 5.07 ± 0.04 | 5.01 ± 0.03 | 0.154 | A,B | 5.04 ± 0.04 | 4.98 ± 0.03 | 0.208 | |
| PP (%) | A | 208 | 511 | 3.93 ± 0.02 | 4.01 ± 0.01 | <0.001 | B,C | 3.95 ± 0.02 | 4.00 ± 0.02 | |
| B | 494 | 225 | 4.00 ± 0.01 | 3.96 ± 0.02 | A,C | 3.99 ± 0.02 | 3.95 ± 0.02 | 0.074 | ||
| C | 298 | 421 | 4.02 ± 0.02 | 3.97 ± 0.02 | 0.009 | A,B | 3.99 ± 0.02 | 3.95 ± 0.02 | 0.073 | |
| FY (kg/d) | A | 208 | 511 | 1.17 ± 0.01 | 1.16 ± 0.01 | 0.162 | B | 1.17 ± 0.01 | 1.17 ± 0.01 | 0.293 |
| B | 494 | 225 | 1.16 ± 0.01 | 1.17 ± 0.01 | 0.167 | A | 1.16 ± 0.01 | 1.18 ± 0.01 | 0.304 | |
| C | 298 | 421 | 1.15 ± 0.01 | 1.17 ± 0.01 | 0.200 | |||||
| PY (kg/d) | A | 208 | 511 | 0.93 ± 0.01 | 0.92 ± 0.01 | 0.257 | ||||
| B | 494 | 225 | 0.92 ± 0.01 | 0.93 ± 0.01 | 0.055 | |||||
| C | 298 | 421 | 0.92 ± 0.01 | 0.93 ± 0.01 | 0.401 | |||||
| MSY (kg/d) | A | 208 | 511 | 2.10 ± 0.02 | 2.08 ± 0.01 | 0.172 | B | 2.10 ± 0.02 | 2.09 ± 0.01 | 0.359 |
| B | 494 | 225 | 2.08 ± 0.01 | 2.10 ± 0.02 | 0.085 | A | 2.08 ± 0.02 | 2.11 ± 0.02 | 0.163 | |
| C | 298 | 421 | 2.07 ± 0.01 | 2.09 ± 0.01 | 0.247 | |||||
1Predicted means and standard error from GLM including ‘cow age’ and ‘weeks in milk’ as factors.
2P < 0.05 in bold and 0.05 ≤ P < 0.1 in italics.
3MY–milk yield; FP–fat percentage; PP–protein percentage; FY–fat yield; PY–protein yield; MSY–milk solid yield.